Preparation

• Preheat oven to 400°F. Lightly coat 8 muffin-tin cups with cooking spray. Stir ketchup, brown sugar and vinegar together in a small bowl; set aside.
• Combine panko, yogurt, egg, Worcestershire, garlic powder, onion powder, paprika and ¼ teaspoon each salt and pepper in a large bowl. Add beef and gently mix until just combined. Divide the mixture between the prepared muffin cups (avoid packing too tightly). Brush the top of each mini meatloaf with some of the ketchup mixture. Bake until an instant-read thermometer inserted in the center registers 160°F, 18 to 20 minutes.
• Meanwhile, prepare whipped cauliflower & green beans: Bring about 1 inch of water to a boil in a large saucepan fitted with a steamer basket. Add cauliflower and steam until very tender, 10 to 12 minutes. Drain and return to the pot. Add yogurt and ¼ teaspoon salt. Using an immersion blender (or food processor), puree until smooth. Sprinkle with chives.
• Steam green beans in the microwave according to package directions. Drain well and transfer to a bowl. Add oil, lemon zest and the remaining ¼ teaspoon salt; toss to coat.
• Serve the meatloaves with the beans and cauliflower.